Bird feeder



FIG. 1 is an isometric view of a bird feeder showing my new design;

FIG. 2 is a front elevational view;

FIG. 3 is a left side elevational view, the right side being identical thereto;

FIG. 4 is rear elevational view;

FIG. 5 is a top plan view; and,

FIG. 6 is a bottom plan view. 

The ornamental design for a bird feeder, as shown. 